Sign in to follow this  
Followers 0
Taji34

[1.7.10].setColorRGBA_I alpha setting not working.

By Taji34, in Modder Support

Recommended Posts

Taji34    5

Taji34
Posted

I'm trying to have an Item where part of it renders with transparency, but it continues to render opaque no matter what. This is the snippet of code I'm using to set the color:

if (i == 0)
			{
				tess.setColorOpaque_I(color[i]);
			}
			else
			{
				GL11.glEnable(GL11.GL_BLEND);
				GL11.glDepthMask(false);
				GL11.glBlendFunc(GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA);
				if (item.stackTagCompound != null)
				{
					double usesLeft = item.stackTagCompound.getInteger("Uses Left");
					double totalUses = item.stackTagCompound.getInteger("Total Uses");
					double percentageLeft = usesLeft/totalUses;
					int alphaLevel = (int) Math.round(255*percentageLeft);
					tess.setColorRGBA_I(color[i], alphaLevel);
				}
			}

Am I missing some OpenGL flags or is something not in the right order?

Share this post

Link to post
Share on other sites

TheGreyGhost    711

TheGreyGhost
Posted

Hi

 

The GL11 flags don't take effect until you render something.  The tessellator queues up a list of commands, but doesn't issue them to openGL until you do the draw.

 

So probably what is happening:

 

1) queue some drawing commands to tessellator

2) change your flags to transparent

3) queue some more drawing commands to tessellator

4) change your flags to opaque

5) queue some more drawing commands to tessellator

6) tessellator.draw

 

At the time of the draw (6), your opengl flags are in opaque mode.  So everything queued up in the tessellator is draw as opaque.

 

You need to either issue the draw command after (1), (3), and (5)  (which may not be possible depending on where your render code is), or alternatively draw using OpenGL directly instead of through the tessellator.

 

Alternatively, items can be rendered in passes, so you could render your transparent sections in pass 1 - look at ItemPotion for inspiration...requiresMultipleRenderPasses, hasEffect, getIconFromDamageForRenderPass

 

Your flags look good to me.

 

-TGG

Share this post

Link to post
Share on other sites

Taji34    5

Taji34
Posted

Well, I'm trying multiple renderPasses, here's my full code for rendering one side of the item:

tess.setNormal(0, 0, 1);
		for (int i = 0; i < iconParts; ++i)
		{
			tess.startDrawingQuads();
			if (i == 0)
			{
				tess.setColorOpaque_I(color[i]);
			}
			else
			{
				GL11.glEnable(GL11.GL_BLEND);
				GL11.glDepthMask(false);
				GL11.glBlendFunc(GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA);
				if (item.stackTagCompound != null)
				{
					double usesLeft = item.stackTagCompound.getInteger("Uses Left");
					double totalUses = item.stackTagCompound.getInteger("Total Uses");
					double percentageLeft = usesLeft/totalUses;
					int alphaLevel = (int) Math.round(255*percentageLeft);
					tess.setColorRGBA_I(color[i], alphaLevel);
				}
			}
			tess.addVertexWithUV(0, 0, 0, xMax[i], yMax[i]);
			tess.addVertexWithUV(1, 0, 0, xMin[i], yMax[i]);
			tess.addVertexWithUV(1, 1, 0, xMin[i], yMin[i]);
			tess.addVertexWithUV(0, 1, 0, xMax[i], yMin[i]);
			tess.draw();
		}

I don't think it's getting set back to opaque.....

Share this post

Link to post
Share on other sites

TheGreyGhost    711

TheGreyGhost
Posted

Hmm that's odd

 

Are you sure the "else" is every being called?

 

Try replacing your if (i==0) {} else {} with the snippet below and seeing if it renders partially opaque

 

GL11.glEnable(GL11.GL_BLEND);
GL11.glDepthMask(false);
GL11.glBlendFunc(GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA);
tess.setColorRGBA_I(color[i], 128);

 

-TGG

Share this post

Link to post
Share on other sites

TheGreyGhost    711

TheGreyGhost
Posted

Hi

 

I'm running out of ideas, sorry!  :(

What happens if you replace your source image with one that has a partial transparency (i.e. alpha channel of say 0.5)?

 

You could try this utility

https://github.com/TheGreyGhost/SpeedyTools/blob/master/src/main/java/speedytools/common/utilities/OpenGLdebugging.java

It will dump a copy of all the opengl rendering flags

 

--> place OpenGLdebugging.dumpAllIsEnabled() immediately before your tess.draw(), it make give a clue about which one should be enabled but isn't.

 

-TGG

Share this post

Link to post
Share on other sites

Taji34    5

Taji34
Posted

So, it wasn't working in first person because of something I forgot, but it is staying opaque in the inventory, which it shouldn't be, here is way your debugger prints out:

GL_VERTEX_ARRAY:false[20:57:00] [Client thread/INFO] [sTDOUT]: [com.taji34.troncraft.OpenGLdebugging:dumpAllIsEnabled:294]:  (Vertex array enable)
GL_NORMAL_ARRAY:false[20:57:00] [Client thread/INFO] [sTDOUT]: [com.taji34.troncraft.OpenGLdebugging:dumpAllIsEnabled:294]:  (Normal array enable)
GL_COLOR_ARRAY:false[20:57:00] [Client thread/INFO] [sTDOUT]: [com.taji34.troncraft.OpenGLdebugging:dumpAllIsEnabled:294]:  (RGBA color array enable)
GL_INDEX_ARRAY:false[20:57:00] [Client thread/INFO] [sTDOUT]: [com.taji34.troncraft.OpenGLdebugging:dumpAllIsEnabled:294]:  (Color-index array enable)
GL_TEXTURE_COORD_ARRAY:false[20:57:00] [Client thread/INFO] [sTDOUT]: [com.taji34.troncraft.OpenGLdebugging:dumpAllIsEnabled:294]:  (Texture coordinate array enable)
GL_EDGE_FLAG_ARRAY:false[20:57:00] [Client thread/INFO] [sTDOUT]: [com.taji34.troncraft.OpenGLdebugging:dumpAllIsEnabled:294]:  (Edge flag array enable)
GL_NORMALIZE:false[20:57:00] [Client thread/INFO] [sTDOUT]: [com.taji34.troncraft.OpenGLdebugging:dumpAllIsEnabled:294]:  (Current normal normalization on/off)
GL_FOG:false[20:57:00] [Client thread/INFO] [sTDOUT]: [com.taji34.troncraft.OpenGLdebugging:dumpAllIsEnabled:294]:  (True if fog enabled)
GL_LIGHTING:false[20:57:00] [Client thread/INFO] [sTDOUT]: [com.taji34.troncraft.OpenGLdebugging:dumpAllIsEnabled:294]:  (True if lighting is enabled)
GL_COLOR_MATERIAL:true[20:57:00] [Client thread/INFO] [sTDOUT]: [com.taji34.troncraft.OpenGLdebugging:dumpAllIsEnabled:294]:  (True if color tracking is enabled)
GL_LIGHT0:true[20:57:00] [Client thread/INFO] [sTDOUT]: [com.taji34.troncraft.OpenGLdebugging:dumpAllIsEnabled:294]:  (True if light 0 enabled)
GL_LIGHT1:true[20:57:00] [Client thread/INFO] [sTDOUT]: [com.taji34.troncraft.OpenGLdebugging:dumpAllIsEnabled:294]:  (True if light 1 enabled)
GL_LIGHT2:false[20:57:00] [Client thread/INFO] [sTDOUT]: [com.taji34.troncraft.OpenGLdebugging:dumpAllIsEnabled:294]:  (True if light 2 enabled)
GL_LIGHT3:false[20:57:00] [Client thread/INFO] [sTDOUT]: [com.taji34.troncraft.OpenGLdebugging:dumpAllIsEnabled:294]:  (True if light 3 enabled)
GL_LIGHT4:false[20:57:00] [Client thread/INFO] [sTDOUT]: [com.taji34.troncraft.OpenGLdebugging:dumpAllIsEnabled:294]:  (True if light 4 enabled)
GL_LIGHT5:false[20:57:00] [Client thread/INFO] [sTDOUT]: [com.taji34.troncraft.OpenGLdebugging:dumpAllIsEnabled:294]:  (True if light 5 enabled)
GL_LIGHT6:false[20:57:00] [Client thread/INFO] [sTDOUT]: [com.taji34.troncraft.OpenGLdebugging:dumpAllIsEnabled:294]:  (True if light 6 enabled)
GL_LIGHT7:false[20:57:00] [Client thread/INFO] [sTDOUT]: [com.taji34.troncraft.OpenGLdebugging:dumpAllIsEnabled:294]:  (True if light 7 enabled)
GL_POINT_SMOOTH:false[20:57:00] [Client thread/INFO] [sTDOUT]: [com.taji34.troncraft.OpenGLdebugging:dumpAllIsEnabled:294]:  (Point antialiasing on)
GL_LINE_SMOOTH:false[20:57:00] [Client thread/INFO] [sTDOUT]: [com.taji34.troncraft.OpenGLdebugging:dumpAllIsEnabled:294]:  (Line antialiasing on)
GL_LINE_STIPPLE:false[20:57:00] [Client thread/INFO] [sTDOUT]: [com.taji34.troncraft.OpenGLdebugging:dumpAllIsEnabled:294]:  (Line stipple enable)
GL_CULL_FACE:true[20:57:00] [Client thread/INFO] [sTDOUT]: [com.taji34.troncraft.OpenGLdebugging:dumpAllIsEnabled:294]:  (Polygon culling enabled)
GL_POLYGON_SMOOTH:false[20:57:00] [Client thread/INFO] [sTDOUT]: [com.taji34.troncraft.OpenGLdebugging:dumpAllIsEnabled:294]:  (Polygon antialiasing on)
GL_POLYGON_OFFSET_POINT:false[20:57:00] [Client thread/INFO] [sTDOUT]: [com.taji34.troncraft.OpenGLdebugging:dumpAllIsEnabled:294]:  (Polygon offset enable for GL_POINT mode rasterization)
GL_POLYGON_OFFSET_LINE:false[20:57:00] [Client thread/INFO] [sTDOUT]: [com.taji34.troncraft.OpenGLdebugging:dumpAllIsEnabled:294]:  (Polygon offset enable for GL_LINE mode rasterization)
GL_POLYGON_OFFSET_FILL:false[20:57:00] [Client thread/INFO] [sTDOUT]: [com.taji34.troncraft.OpenGLdebugging:dumpAllIsEnabled:294]:  (Polygon offset enable for GL_FILL mode rasterization)
GL_POLYGON_STIPPLE:false[20:57:00] [Client thread/INFO] [sTDOUT]: [com.taji34.troncraft.OpenGLdebugging:dumpAllIsEnabled:294]:  (Polygon stipple enable)
GL_TEXTURE_1D:false[20:57:00] [Client thread/INFO] [sTDOUT]: [com.taji34.troncraft.OpenGLdebugging:dumpAllIsEnabled:294]:  (True if 1-D texturing enabled )
GL_TEXTURE_2D:true[20:57:00] [Client thread/INFO] [sTDOUT]: [com.taji34.troncraft.OpenGLdebugging:dumpAllIsEnabled:294]:  (True if 2-D texturing enabled )
GL_TEXTURE_GEN_S:false[20:57:00] [Client thread/INFO] [sTDOUT]: [com.taji34.troncraft.OpenGLdebugging:dumpAllIsEnabled:294]:  (Texgen enabled (x is S, T, R, or Q))
GL_TEXTURE_GEN_T:false[20:57:00] [Client thread/INFO] [sTDOUT]: [com.taji34.troncraft.OpenGLdebugging:dumpAllIsEnabled:294]:  (Texgen enabled (x is S, T, R, or Q))
GL_TEXTURE_GEN_R:false[20:57:00] [Client thread/INFO] [sTDOUT]: [com.taji34.troncraft.OpenGLdebugging:dumpAllIsEnabled:294]:  (Texgen enabled (x is S, T, R, or Q))
GL_TEXTURE_GEN_Q:false[20:57:00] [Client thread/INFO] [sTDOUT]: [com.taji34.troncraft.OpenGLdebugging:dumpAllIsEnabled:294]:  (Texgen enabled (x is S, T, R, or Q))
GL_SCISSOR_TEST:false[20:57:00] [Client thread/INFO] [sTDOUT]: [com.taji34.troncraft.OpenGLdebugging:dumpAllIsEnabled:294]:  (Scissoring enabled)
GL_ALPHA_TEST:true[20:57:00] [Client thread/INFO] [sTDOUT]: [com.taji34.troncraft.OpenGLdebugging:dumpAllIsEnabled:294]:  (Alpha test enabled)
GL_STENCIL_TEST:false[20:57:00] [Client thread/INFO] [sTDOUT]: [com.taji34.troncraft.OpenGLdebugging:dumpAllIsEnabled:294]:  (Stenciling enabled)
GL_DEPTH_TEST:true[20:57:00] [Client thread/INFO] [sTDOUT]: [com.taji34.troncraft.OpenGLdebugging:dumpAllIsEnabled:294]:  (Depth buffer enabled)
GL_BLEND:true[20:57:00] [Client thread/INFO] [sTDOUT]: [com.taji34.troncraft.OpenGLdebugging:dumpAllIsEnabled:294]:  (Blending enabled)
GL_DITHER:true[20:57:00] [Client thread/INFO] [sTDOUT]: [com.taji34.troncraft.OpenGLdebugging:dumpAllIsEnabled:294]:  (Dithering enabled)
GL_INDEX_LOGIC_OP:false[20:57:00] [Client thread/INFO] [sTDOUT]: [com.taji34.troncraft.OpenGLdebugging:dumpAllIsEnabled:294]:  (Color index logical operation enabled)
GL_COLOR_LOGIC_OP:false[20:57:00] [Client thread/INFO] [sTDOUT]: [com.taji34.troncraft.OpenGLdebugging:dumpAllIsEnabled:294]:  (RGBA color logical operation enabled)
GL_AUTO_NORMAL:false[20:57:00] [Client thread/INFO] [sTDOUT]: [com.taji34.troncraft.OpenGLdebugging:dumpAllIsEnabled:294]:  (True if automatic normal generation enabled)

It stays opaque even with a texture that has an alpha channel of .5, any ideas?

 

 

Share this post

Link to post
Share on other sites

TheGreyGhost    711

TheGreyGhost
Posted

Hi

 

Are you perhaps drawing it twice on top of itself, once as opaque, once as transparent?

 

What did you forget in 1st person, as a matter of interest?

 

-TGG

Share this post

Link to post
Share on other sites

Taji34    5

Taji34
Posted

I forgot to tell it that it should use my renderer for first person rendering. And I don't think it's rendering multiple times. I'll take a look at that, but I've decided to not do the transparency, it doesn't look right at the moment and I have more important parts of my mod to work on. Thanks for all your help though!

Share this post

Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
Sign in to follow this  
Followers 0
Go To Topic Listing


  • Recently Browsing

    No registered users viewing this page.

  • Posts

    • DaemonUmbra
      [1.12.2 Build 2847] Server Crash on startup

      By DaemonUmbra · Posted

      You are missing a mod that LittleTiles depends on, please re-read the mod’s CurseForge page
    • JetCobblestone
      [1.14] moving item assignment to a separate function

      By JetCobblestone · Posted

      @LexManos I think I've made a lot more concise!!!!   package jetcobblestone.firstmod; import jetcobblestone.firstmod.lists.itemList; import net.minecraft.item.Foods; import net.minecraft.item.Item; import net.minecraft.item.ItemGroup; import net.minecraft.util.ResourceLocation; import net.minecraftforge.event.RegistryEvent; import net.minecraftforge.eventbus.api.SubscribeEvent; import net.minecraftforge.fml.common.Mod; @Mod.EventBusSubscriber(bus=Mod.EventBusSubscriber.Bus.MOD) public class ItemsLoader { @SubscribeEvent public static void registerItems(final RegistryEvent.Register<Item> event) { event.getRegistry().registerAll ( itemList.hair_fibre = new Item(new Item.Properties().food(Foods.COOKIE).group(ItemGroup.FOOD).maxStackSize(1)).setRegistryName(location("hair_fibre")) ); } private static ResourceLocation location(String name) { return new ResourceLocation(FirstMod.modid, name); } }   I didn't realise you could have the @Mod.EventBus... outside of a class, but I understand now that it's meant to go outside a class, thanks to your reply   Also I think you have a few haters     Don't know why though... you've been really helpful   Also, do you have any suggested improvements? Like for efficiency or smmin. For example I don't know if there is a better way to do that helper method at the end, or if it's even advised. I'm really happy I got this to work without copying code straight from a tutorial! I'm now really excited for this, as it will be really easy to navigate in the future. Again, is it advised to separate everything into different classes for efficiency? It certainly makes code easier to navigate.   Edit: I only just realised ur the guy who makes forge lmao   Really nice to see somebody so high up in the community help on small posts like this one!
    • JetCobblestone
      [1.14] moving item assignment to a separate function

      By JetCobblestone · Posted

      I have good python knowledge and watched about 20 episodes of a good java tutorial, however I don't know I watched enough to get onto important things like class structure etc. I was hoping that it would mainly be different syntax, and a lot of it is. However, what I have found is that java is quite different. It's been very frustrating, but I feel like I'm learning a lot about java but also how minecraft and mc mods work by trying to make a modpack - something I've always wanted to do. I agree that there are quite a lot of confusions, but I'm knocking them out one by one and the response I've had on these forums has been really encouraging and helpful.
    • Rohman
      [1.12.2 Build 2847] Server Crash on startup

      By Rohman · Posted

      Here you go. Thanks for having a look. debug(1).log
    • diesieben07
      Server Cannot Start

      By diesieben07 · Posted

      You installed a client-only mod (Controllable) on the server. Mods have the ability to indicate their client-only-ness to Forge and it will not load the mod on a server. This mod has not done so, please report this bug to the mod author.

  • Topics

  • Who's Online (See full list)